The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

In the early Roman Empire, people deemed traitors and criminals were tossed to their deaths from this rock.

The pristine waters crossing this forest form a hidden waterfall among the dense vegetation.

A 2,000-year-old engineering wonder hides beneath an Italian town.

This ancient market is often referred to as the oldest shopping mall in the world.

An incredible mosaic-lined monument said to have held the remains of an ancient Roman empress.

For centuries, this large Roman villa remained hidden thanks to the eruption that buried nearby Pompeii and Herculaneum.

This ancient Roman arch misled treasure hunters for centuries.

This scenic fortress dates back at least 2,400 years to the time of Magna Graecia.

A 12th-century Italian skirmish gets reenacted with 500,000 pounds of flying citrus.

Buried next to Pompeii, this lesser-known Roman villa was the opulent vacation home of Emperor Nero's wife.

Does this strange mural depict witches battling beneath a penis tree?

A magnificent waterfall is also home to the remains of a Roman hydraulic engineering system.

The sunlight passing through the opening of this huge cave system creates a magical effect.

A semi-abandoned village destroyed by U.S. bombings during World War II dominates the valley of Turano.

This ancient trail climbs the mountain where a Latin League cult worshipped Jupiter, its main deity.

A beautifully well-preserved ancient Roman villa.

Amalfi's pre-industrial history is slowly being engulfed by the lush vegetation of the Ferriere Valley.

The city of Palestrina was built around this magnificent terraced sanctuary dedicated to the pagan goddess Fortuna.

Nestled in the hills of Tuscany are gorgeous, multicolored hot springs.

This amazingly well-preserved villa just outside Pompeii boasts rare examples of ancient Roman paintings.

This ancient altar emerges from the thick forests to reveal the mysteries of Etruscan sacrificial rituals.

This seaside Italian village doesn't just look Escher-esque, it actually inspired the mind-bending artist.

Ancient ruins hidden underneath a modern luxury hotel.